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Date: Tue, 15 Mar 2011 22:32:25 +0000
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Subject: Re: [PATCH 3/4 v3] smp_call_function_many: handle concurrent clearing
 of mask
From: Catalin Marinas <catalin.marinas@arm.com>
To: Milton Miller <miltonm@bga.com>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
        Mike Galbraith <efault@gmx.de>, Dimitri Sivanich <sivanich@sgi.com>,
        Tony Luck <tony.luck@intel.com>, Jan Beulich <JBeulich@novell.com>,
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On Tuesday, 15 March 2011, Milton Miller <miltonm@bga.com> wrote:
> Mike Galbraith reported finding a lockup ("perma-spin bug") where the
> cpumask passed to smp_call_function_many was cleared by other cpu(s)
> while a cpu was preparing its call_data block, resulting in no cpu to
> clear the last ref and unlock the block.

I missed your patch and just posted something similar. I'll leave it
to you then ;)

https://lkml.org/lkml/2011/3/15/296

Catalin

-- 
Catalin
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